Mount St. Helens Activity

Mount St. Helens is showing some activity. This is from the webcam page at Johnston Ridge Observatory.

Read the latest geological survey update below the fold.

CVO Menu – Cascade Range Volcanoes and Volcanics – Current Update
U.S. Geological Survey, Vancouver, Washington
University of Washington, Pacific Northwest Seismograph Network, Seattle, Washington

Tuesday, December 19, 2006 09:27 PST (Tuesday, December 19, 2006 17:27 UTC)
MOUNT ST. HELENS UPDATE

Current Volcanic- Alert Level WATCH ; Aviation Color Code ORANGE : Growth of the new lava dome inside the crater of Mount St. Helens continues, accompanied by low rates of seismicity, low emissions of steam and volcanic gases, and minor production of ash. During such eruptions, changes in the level of activity can occur over days to months. The eruption could intensify suddenly or with little warning and produce explosions that cause hazardous conditions within several miles of the crater and farther downwind. Small lahars could suddenly descend the Toutle River if triggered by heavy rain or by interaction of hot rocks with snow and ice. These lahars pose a negligible hazard below the Sediment Retention Structure (SRS) but could pose a hazard along the river channel upstream.

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